DTC B1959 Acura
Rear MICU Lost Communication with Relay Control Module (RM Message)
Rear MICU Lost Communication with Relay Control Module (RM Message)
Description
Poor communication between the rear MICU and the Relay Control Module. NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. If DTCs B1005, B1058, B1959, B2162, and or B2970 are all indicated, perform the Relay Control Module input test. If no codes are present, perform the rear MICU input test.
Cause and Solution
Loose or poor connections between the rear MICU and the relay control module.
Blown fuse in the main under-hood fuse box
Blown fuse in the under-dash fuse relay box
Open or Short Condition between the rear MICU and the Relay Control Module
Faulty Relay Control Module
Video Guide
Diagnostic Info
- DTC Code: B1959
- Brand: Acura